Validation in selection screen

[Former Member]

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• SELECT-OPTIONS AND PARAMETERS

*----

---

selection-screen begin of block a with frame title text-001.

selection-screen begin of line.

selection-screen comment 1(20) for field p_bl.

parameters : p_bl as checkbox .

selection-screen end of line.

selection-screen begin of line.

selection-screen comment 1(20) for field p_di.

parameters : p_di as checkbox .

selection-screen end of line.

selection-screen begin of line.

selection-screen comment 1(20) for field p_pl.

parameters : p_pl as checkbox .

selection-screen comment 25(20) for field p_plout.

parameters : p_plout like nast-kschl.

selection-screen end of line.

selection-screen begin of line.

selection-screen comment 1(20) for field p_in.

parameters : p_in as checkbox .

selection-screen comment 25(20) for field p_inout.

parameters : p_inout like nast-kschl.

selection-screen end of line.

selection-screen end of block a.

selection-screen begin of block c with frame title text-003.

parameters: pa_email no-display ,

pa_downl no-display.

selection-screen end of block c.

*----

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• START-OF-SELECTION

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if p_bl eq c_x.

perform download_bl.

endif.

if p_di eq c_x.

perform download_di.

endif.

• If Delivery Order is checked

if p_pl eq c_x.

perform download_packlist.

endif.

• If Invoice , Based On The OutPut Type is checked

if p_in eq c_x .

perform download_invoice.

endif.

I using the above program.

My question is i want validation in selection screen for below stmts.

1) atleast 1 of the check box should be selected

2) If packing list is selected, then the message type Must be selected. (can not allow blank)

3) If invoice list is selected, then the message type must be selected

4) Validate the message type field entered.

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[Former Member]

Hi Sen 001

It depends how you want to validate. If you want to validate immediately after the user put a check box or enter value then you shoul use <AT SELECTION SCREEN> event and <USER-COMMAND> following your parameters (or select-options) in your selection screen. You can also validate when user presses F8, where you should put your validation inside <START-OF-SELECTION> event.

Example to immediate validate after check box entered

 
SELECTION-SCREEN: BEGIN OF BLOCK b02 WITH FRAME.
PARAMETERS: p_grp RADIOBUTTON GROUP gr1 DEFAULT 'X' USER-COMMAND zcomm,
            p_dst RADIOBUTTON GROUP gr1.
SELECTION-SCREEN: END   OF BLOCK b02.

AT SELECTION-SCREEN.
  IF sy-ucomm(6) = 'ZCOMM'.
    PERFORM xxx.
  ELSE.
    PERFORM yyy.
  ENDIF.

[Former Member]

Try to use AT SELECTION-SCREEN OUTPUT event.